Package com.drew.metadata

Class TagDescriptor<T extends Directory>

java.lang.Object

com.drew.metadata.TagDescriptor<T>

Direct Known Subclasses:

AdobeJpegDescriptor, AppleMakernoteDescriptor, AppleRunTimeMakernoteDescriptor, AviDescriptor, BmpHeaderDescriptor, CanonMakernoteDescriptor, CasioType1MakernoteDescriptor, CasioType2MakernoteDescriptor, EpsDescriptor, ExifDescriptorBase, FileSystemDescriptor, FileTypeDescriptor, FujifilmMakernoteDescriptor, GifAnimationDescriptor, GifCommentDescriptor, GifControlDescriptor, GifHeaderDescriptor, GifImageDescriptor, GpsDescriptor, HeifDescriptor, HuffmanTablesDescriptor, IccDescriptor, IcoDescriptor, IptcDescriptor, JfifDescriptor, JfxxDescriptor, JpegCommentDescriptor, JpegDescriptor, KodakMakernoteDescriptor, KyoceraMakernoteDescriptor, LeicaMakernoteDescriptor, LeicaType5MakernoteDescriptor, Mp3Descriptor, Mp4Descriptor, Mp4HintDescriptor, Mp4MetaDescriptor, Mp4SoundDescriptor, Mp4TextDescriptor, Mp4UuidBoxDescriptor, Mp4VideoDescriptor, NikonType1MakernoteDescriptor, NikonType2MakernoteDescriptor, OlympusCameraSettingsMakernoteDescriptor, OlympusEquipmentMakernoteDescriptor, OlympusFocusInfoMakernoteDescriptor, OlympusImageProcessingMakernoteDescriptor, OlympusMakernoteDescriptor, OlympusRawDevelopment2MakernoteDescriptor, OlympusRawDevelopmentMakernoteDescriptor, OlympusRawInfoMakernoteDescriptor, PanasonicMakernoteDescriptor, PanasonicRawDistortionDescriptor, PanasonicRawIFD0Descriptor, PanasonicRawWbInfo2Descriptor, PanasonicRawWbInfoDescriptor, PcxDescriptor, PentaxMakernoteDescriptor, PhotoshopDescriptor, PngDescriptor, PrintIMDescriptor, PsdHeaderDescriptor, QuickTimeDescriptor, ReconyxHyperFire2MakernoteDescriptor, ReconyxHyperFireMakernoteDescriptor, ReconyxUltraFireMakernoteDescriptor, RicohMakernoteDescriptor, SamsungType2MakernoteDescriptor, SanyoMakernoteDescriptor, SigmaMakernoteDescriptor, SonyType1MakernoteDescriptor, SonyType6MakernoteDescriptor, WavDescriptor, WebpDescriptor, XmpDescriptor

public class TagDescriptor<T extends Directory>
extends java.lang.Object

Base class for all tag descriptor classes. Implementations are responsible for providing the human-readable string representation of tag values stored in a directory. The directory is provided to the tag descriptor via its constructor.

Field Summary

Fields

Modifier and Type	Field	Description
protected T	_directory

Constructor Summary

Constructors

Constructor	Description
TagDescriptor(T directory)

Method Summary

Modifier and Type	Method	Description
static java.lang.String	convertBytesToVersionString(int[] components, int majorDigits)	Takes a series of 4 bytes from the specified offset, and converts these to a well-known version number, where possible.
protected java.lang.String	get7BitStringFromBytes(int tagType)
protected java.lang.String	getBitFlagDescription(int tagType, java.lang.Object... labels)	LSB first.
protected java.lang.String	getByteLengthDescription(int tagType)
protected java.lang.String	getDecimalRational(int tagType, int decimalPlaces)
java.lang.String	getDescription(int tagType)	Returns a descriptive value of the specified tag for this image.
protected java.lang.String	getEncodedTextDescription(int tagType)
protected java.lang.String	getEpochTimeDescription(int tagType)
protected static java.lang.String	getFocalLengthDescription(double mm)
protected java.lang.String	getFormattedFloat(int tagType, java.lang.String format)
protected java.lang.String	getFormattedInt(int tagType, java.lang.String format)
protected java.lang.String	getFormattedString(int tagType, java.lang.String format)
protected static java.lang.String	getFStopDescription(double fStop)
protected java.lang.String	getIndexedDescription(int tagType, int baseIndex, java.lang.String... descriptions)
protected java.lang.String	getIndexedDescription(int tagType, java.lang.String... descriptions)
protected java.lang.String	getLensSpecificationDescription(int tag)
protected java.lang.String	getOrientationDescription(int tag)
protected java.lang.String	getRationalOrDoubleString(int tagType)
protected java.lang.String	getShutterSpeedDescription(int tag)
protected java.lang.String	getSimpleRational(int tagType)
protected java.lang.String	getStringFromBytes(int tag, java.nio.charset.Charset cs)
protected java.lang.String	getVersionBytesDescription(int tagType, int majorDigits)

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Detail

_directory

protected final T extends Directory _directory

Constructor Detail

TagDescriptor

public TagDescriptor(T directory)

Method Detail

getDescription

public java.lang.String getDescription(int tagType)

Returns a descriptive value of the specified tag for this image. Where possible, known values will be substituted here in place of the raw tokens actually kept in the metadata segment. If no substitution is available, the value provided by getString(tagType) will be returned.

Parameters:

tagType - the tag to find a description for

Returns:

a description of the image's value for the specified tag, or null if the tag hasn't been defined.

convertBytesToVersionString

public static java.lang.String convertBytesToVersionString(int[] components,
                                                           int majorDigits)

Takes a series of 4 bytes from the specified offset, and converts these to a well-known version number, where possible.

Two different formats are processed:

• [30 32 31 30] -> 2.10
• [0 1 0 0] -> 1.00

Parameters:

components - the four version values

majorDigits - the number of components to be

Returns:

the version as a string of form "2.10" or null if the argument cannot be converted

getVersionBytesDescription

protected java.lang.String getVersionBytesDescription(int tagType,
                                                      int majorDigits)

getIndexedDescription

protected java.lang.String getIndexedDescription(int tagType,
                                                 java.lang.String... descriptions)

getIndexedDescription

protected java.lang.String getIndexedDescription(int tagType,
                                                 int baseIndex,
                                                 java.lang.String... descriptions)

getByteLengthDescription

protected java.lang.String getByteLengthDescription(int tagType)

getSimpleRational

protected java.lang.String getSimpleRational(int tagType)

getDecimalRational

protected java.lang.String getDecimalRational(int tagType,
                                              int decimalPlaces)

getFormattedInt

protected java.lang.String getFormattedInt(int tagType,
                                           java.lang.String format)

getFormattedFloat

protected java.lang.String getFormattedFloat(int tagType,
                                             java.lang.String format)

getFormattedString

protected java.lang.String getFormattedString(int tagType,
                                              java.lang.String format)

getEpochTimeDescription

protected java.lang.String getEpochTimeDescription(int tagType)

getBitFlagDescription

protected java.lang.String getBitFlagDescription(int tagType,
                                                 java.lang.Object... labels)

LSB first. Labels may be null, a String, or a String[2] with (low label,high label) values.

get7BitStringFromBytes

protected java.lang.String get7BitStringFromBytes(int tagType)

getStringFromBytes

protected java.lang.String getStringFromBytes(int tag,
                                              java.nio.charset.Charset cs)

getRationalOrDoubleString

protected java.lang.String getRationalOrDoubleString(int tagType)

getFStopDescription

protected static java.lang.String getFStopDescription(double fStop)

getFocalLengthDescription

protected static java.lang.String getFocalLengthDescription(double mm)

getLensSpecificationDescription

protected java.lang.String getLensSpecificationDescription(int tag)

getOrientationDescription

protected java.lang.String getOrientationDescription(int tag)

getShutterSpeedDescription

protected java.lang.String getShutterSpeedDescription(int tag)

getEncodedTextDescription

protected java.lang.String getEncodedTextDescription(int tagType)